<style>
    input[type^="search"] {
        min-width: 300px;
    }
</style>
<ui-select ng-model="$ctrl.selectdata" ng-change="$ctrl.selectThis($ctrl.selectdata)" theme="bootstrap" style="width:300px;">
    <ui-select-match placeholder="搜索系统用户">{{$select.selected.realname}}</ui-select-match>
    <ui-select-choices repeat="x in $ctrl.selectList | filter: $select.search|limitTo:15">
        <div ng-bind-html="x.realname | highlight: $select.search"></div>
    </ui-select-choices>
</ui-select>